Vianney Tumwesige and listers, Hello,
Look at biogas.wikispaces.com , under biogas burners. I had written a paper on biogas burners and Paul Harris has summerised it and put it on the biogas wikispaces. Paul also set up a spreadsheet based on the equations that I had found, that might be useful as a design tool. This is a reminder to listers that this wikispaces is a useful set of resources as well as links to other resources that can be used to discover more about biogas. It should be the first place that people doing research on biogas should look. Best wishes, David F ******************************************************************** Dr David Fulford CEnv MEI, 15, Brandon Ave, Woodley, Reading RG5 4PU [email protected], Tel: +44(0)118 326 9779 Mob: +44(0)7746 806401 Kingdom Bioenergy Ltd, www.kingdombio.com, [email protected] Skype Identity: djfulford ---------------------------------------- From: "Vianney Tumwesige" <[email protected]> Sent: 21 May 2012 02:00 To: "For Discussion of Anaerobic Digestion" <[email protected]> Subject: [Digestion] Biogas appliances Dear All, I am writing a paper on biogas appliances, below is an extract from the paper. All gas burners follow the same principle; the force which drives the gas and air into the burner is the pressure of gas in the pipeline. A biogas stove can have single or double burner with varying gas consumption rates ranging from 220 dm3 hr-1 to 450 dm3 hr-1 at standard temperature and pressure. This consumption rate results from the pressure provided by the biogas plant and the diameter of the inlet pipe. The jet at the inlet of the burner increases the gas speed, so producing a draft that sucks primary air into the pipe. The primary air must be completely mixed with the biogas, and this is achieved by widening the pipe to a minimum diameter, which is in constant relation [JUS1] to the diameter of the jet. The widening of the pipe again reduces the speed of the gas. This diffuse gas goes into the burner head. The burner head is formed in such a way as to allow equal gas pressure everywhere before the gas/air mixture leaves the burner through the orifices at a speed only slightly above 0.25 ms-1, the specific flame speed of biogas. More oxygen (secondary air) is supplied by the surrounding air to enable final combustion. ---------------------------------------- [JUS1]Specify what this constant relationship is plus reference Please, is some one in position to provide more information on the highlighted section of the extract? Thank you in advance, Regards-- Vianney Tumwesige Director - Green Heat (U) Ltd P.O. Box 10235 Kampala-Uganda 256 (0) 71 237 9889 "The more people are self sufficient in cooking fuel, the more personal and financial freedom they have." - Emma Casson
_______________________________________________ Digestion mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org for more information about digestion, see Beginner's Guide to Biogas http://www.adelaide.edu.au/biogas/ and the Biogas Wiki http://biogas.wikispaces.com/
